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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
18.6k
Companies
980
Updated
11.12.2026
18.6k Questions 980 Companies11.12.2026
PLTCHK testimonial
PLTCHK

"I got asked a hardcore MCM DP question and I saw it on PracHub as well. Solved that question in 5 minutes. Without PracHub I doubt I could solve it in 5 hours. Though somehow didn't get hired, perhaps I guess I solved it too fast? /s"

_The_TaNk_ testimonial
_The_TaNk_

"Believe me i'm a student here jn US. Recently interviewed for MSFT. They asked me exact question from PracHub. I saw it the night before and ignored it cause why waste time on random sites. I legit wanna go back and redo this whole thing if I had chance. Not saying will work for everyone but there is certainly some merit to that website. And i'm gonna use it in future prep from now on like lc tagged"

Chris testimonial
ChrisSenior SWE, LinkedIn

"10 years of experience but never worked at a top company. PracHub's senior-level questions helped me break into FAANG at 35. Age is just a number."

sleepy33 testimonial
sleepy33

"I was skeptical about the 'real questions' claim, so I put it to the test. I searched for the exact question I got grilled on at my last Meta onsite... and it was right there. Word for word."

Jake testimonial
JakeSenior ML Engineer, Lyft

"Got a Google recruiter call on Monday, interview on Friday. Crammed PracHub for 4 days. Passed every round. This platform is a miracle worker."

nuggetlord testimonial
nuggetlord

"I've used LC, Glassdoor, and random Discords. Nothing comes close to the accuracy here. The questions are actually current — that's what got me. Felt like I had a cheat sheet during the interview."

Carlos testimonial
CarlosFull Stack, Shopify

"The solution quality is insane. It covers approach, edge cases, time complexity, follow-ups. Nothing else comes close."

boba.tea.vibes testimonial
boba.tea.vibes

"Legit the only resource you need. TC went from 180k -> 350k. Just memorize the top 50 for your target company and you're golden."

Andy testimonial
AndySWE-II, Google

"PracHub Premium for one month cost me the price of two coffees a week. It landed me a $280K+ starting offer."

couchpotato99 testimonial
couchpotato99

"Literally just signed a $600k offer. I only had 2 weeks to prep, so I focused entirely on the company-tagged lists here. If you're targeting L5+, don't overthink it."

Shruti testimonial
ShrutiData Engineer, Salesforce

"Coaches and bootcamp prep courses cost around $200-300 but PracHub Premium is actually less than a Netflix subscription. And it landed me a $178K offer."

midnightramen testimonial
midnightramen

"I honestly don't know how you guys gather so many real interview questions. It's almost scary. I walked into my Amazon loop and recognized 3 out of 4 problems from your database."

Bianca testimonial
BiancaFrontend Eng, Figma

"Discovered PracHub 10 days before my interview. By day 5, I stopped being nervous. By interview day, I was actually excited to show what I knew."

tambrahm007 testimonial
tambrahm007

"I recently cleared Uber interviews (strong hire in the design round) and all the questions were present in prachub."

toa testimonial
toa

"The search is what sold me. I typed in a really niche DP problem I got asked last year and it actually came up, full breakdown and everything. These guys are clearly updating it constantly."

PLTCHK testimonial
PLTCHK

"I got asked a hardcore MCM DP question and I saw it on PracHub as well. Solved that question in 5 minutes. Without PracHub I doubt I could solve it in 5 hours. Though somehow didn't get hired, perhaps I guess I solved it too fast? /s"

_The_TaNk_ testimonial
_The_TaNk_

"Believe me i'm a student here jn US. Recently interviewed for MSFT. They asked me exact question from PracHub. I saw it the night before and ignored it cause why waste time on random sites. I legit wanna go back and redo this whole thing if I had chance. Not saying will work for everyone but there is certainly some merit to that website. And i'm gonna use it in future prep from now on like lc tagged"

Chris testimonial
ChrisSenior SWE, LinkedIn

"10 years of experience but never worked at a top company. PracHub's senior-level questions helped me break into FAANG at 35. Age is just a number."

sleepy33 testimonial
sleepy33

"I was skeptical about the 'real questions' claim, so I put it to the test. I searched for the exact question I got grilled on at my last Meta onsite... and it was right there. Word for word."

Jake testimonial
JakeSenior ML Engineer, Lyft

"Got a Google recruiter call on Monday, interview on Friday. Crammed PracHub for 4 days. Passed every round. This platform is a miracle worker."

nuggetlord testimonial
nuggetlord

"I've used LC, Glassdoor, and random Discords. Nothing comes close to the accuracy here. The questions are actually current — that's what got me. Felt like I had a cheat sheet during the interview."

Carlos testimonial
CarlosFull Stack, Shopify

"The solution quality is insane. It covers approach, edge cases, time complexity, follow-ups. Nothing else comes close."

boba.tea.vibes testimonial
boba.tea.vibes

"Legit the only resource you need. TC went from 180k -> 350k. Just memorize the top 50 for your target company and you're golden."

Andy testimonial
AndySWE-II, Google

"PracHub Premium for one month cost me the price of two coffees a week. It landed me a $280K+ starting offer."

couchpotato99 testimonial
couchpotato99

"Literally just signed a $600k offer. I only had 2 weeks to prep, so I focused entirely on the company-tagged lists here. If you're targeting L5+, don't overthink it."

Shruti testimonial
ShrutiData Engineer, Salesforce

"Coaches and bootcamp prep courses cost around $200-300 but PracHub Premium is actually less than a Netflix subscription. And it landed me a $178K offer."

midnightramen testimonial
midnightramen

"I honestly don't know how you guys gather so many real interview questions. It's almost scary. I walked into my Amazon loop and recognized 3 out of 4 problems from your database."

Bianca testimonial
BiancaFrontend Eng, Figma

"Discovered PracHub 10 days before my interview. By day 5, I stopped being nervous. By interview day, I was actually excited to show what I knew."

tambrahm007 testimonial
tambrahm007

"I recently cleared Uber interviews (strong hire in the design round) and all the questions were present in prachub."

toa testimonial
toa

"The search is what sold me. I typed in a really niche DP problem I got asked last year and it actually came up, full breakdown and everything. These guys are clearly updating it constantly."

Showing 20 results
Nextdoor logo
Nextdoor
Medium
Software Engineer Locked

Group Photos and Sort Feed Items

This question evaluates proficiency in list/sequence transformation, detecting consecutive runs, grouping elements, aggregating attributes, and perfor...

Coding & Algorithms
19
0
160 people solved
May 31, 2026
Amazon logo
AmazonMicrosoftGoogleMeta

Also asked at Google, Meta

Easy
Software Engineer

Filter Phone Numbers in Two Exact Formats

Problem Write a one-line Bash script that reads file.txt and prints its valid phone-number lines to standard output. The file contains one phone-numbe...

Coding & AlgorithmsString AlgorithmsProgramming Languages
0
0
5 people solved
DRW logo
DRW
Hard
Software EngineerNew Grad Locked

Maximize a Digit Subsequence with Even Counts of Ones and Twos

Delete digits while preserving order to maximize a number whose counts of both ones and twos are even, with linear-time handling of long strings.

Coding & AlgorithmsGreedy
19
0
132 people solved
Aug 28, 2026
Pinterest logo
Pinterest
Hard
Machine Learning Engineer

Answer core ML fundamentals questions

You are asked several short ML fundamentals questions: 1) Define precision and recall for a binary classifier and explain how they relate to a confusi...

Machine LearningML Fundamentals
41
1
388 people solved
Feb 9, 2026
Two Sigma logo
Two Sigma
Easy
Data Scientist

Answer four core statistics questions

Problem set (timed) Answer the following four questions. 1) Covariance of order statistics Let \(X\) and \(Y\) be independent \(\mathrm{Unif}(0,1)\). ...

Statistics & MathProbabilitySampling & Estimation
57
1
399 people solved
Dec 15, 2025
Vanta logo
Vanta
Medium
Software Engineer

Design a DAU/MAU metrics system

Question Design a system that computes and serves product engagement metrics — DAU (Daily Active Users) and MAU (Monthly Active Users) — for a large c...

System DesignBatch & Stream ProcessingData Ingestion & CDC
94
0
770 people solved
Feb 23, 2026
Snowflake logo
Snowflake
Medium
Software Engineer

Build a Tree Whose Nodes Hold the Original Tree's Subtree Sums

Every node of a rooted tree holds an integer. Build a second tree with the same shape in which each node holds the sum of all the values in the corres...

Coding & AlgorithmsTrees
4
0
37 people solved
Apr 28, 2026
Google logo
Google
Medium
Product Manager

Gemini request path: architecture from user prompt to grounded, streamed answer

At a high level, design the system that lets Gemini answer a query a user sends it: the main components and how one request moves through them. `hint ...

System DesignTechnical Tradeoffs for PMsLLM Applications
1
0
20 people solved
Jun 28, 2026
Capital One logo
Capital One
Medium
Software Engineer Locked

Count Pairs of Cyclically Equivalent Integers

Count unordered index pairs whose non-negative integers have decimal strings equivalent under cyclic rotation. The algorithm challenge emphasizes a pr...

Coding & AlgorithmsArrays & Strings
14
0
195 people solved
Jul 21, 2026
Google logo
Google
Medium
Software Engineer Locked

Earliest Time of Full Connectivity

Find the earliest event timestamp at which an evolving undirected graph becomes fully connected.

Coding & Algorithms
16
5
256 people solved
Aug 18, 2026
Snapchat logo
Snapchat
Hard
Machine Learning Engineer

Explain Embeddings, Positive Labels, and Retraining in a Recommendation Project

Explain Embeddings, Positive Labels, and Retraining in a Recommendation Project Discuss a content-recommendation project you worked on. Explain the pa...

Machine LearningRecommendation SystemsAnnotation & Label Quality
2
0
31 people solved
Sep 12, 2026
Indeed logo
Indeed
Medium
Product Manager

Indeed job marketplace critique: choose a user segment and design an upgrade

How would you improve Indeed, the job marketplace where people search and apply for jobs and employers post openings and look for candidates? `hint Tw...

Product Design & StrategyProduct Design & ImprovementGrowth & Monetization
1
0
9 people solved
Sep 15, 2026
Microsoft logo
Microsoft
Medium
Software EngineerSenior+ Locked

Convert a Hexadecimal Address to Dotted IPv4

Convert an eight-digit hexadecimal address to network-order dotted IPv4 with strict validation, optional prefixes, and correct high-bit handling.

Coding & AlgorithmsParsing & InterpretersMath & Number Theory
2
0
35 people solved
Aug 30, 2026
Anthropic logo
Anthropic
Medium
Software Engineer Locked

Explain Ownership of a Project Business Metric

Explain how one project's primary business metric was proposed, challenged, approved, instrumented, and monitored. Connect your technical contribution...

Behavioral & LeadershipMetrics & KPIsCommunication & Stakeholders
11
0
201 people solved
Jul 30, 2026
C3 AI logo
C3 AI
Hard
Data Scientist Locked

Evaluate a Retrieval-Augmented Generation System

Build a rigorous RAG evaluation framework across retrieval recall, answer correctness, claim-level citations, abstention, permissions, freshness, late...

ML System Design
6
0
47 people solved
Aug 21, 2026
Databricks logo
DatabricksAmazonMicrosoft

Also asked at Microsoft, Bloomberg, Google, Meta, Snowflake, Yandex, Revolut, TCS, Walmart Labs, Splunk

Hard
Software Engineer Locked

Find all anagram start indices

This question evaluates proficiency in string manipulation, algorithmic efficiency, and pattern detection through character frequency analysis, assess...

Coding & AlgorithmsTwo Pointers & Sliding WindowArrays & Strings
23
1
213 people solved
Roblox logo
Roblox
Medium
Machine Learning Engineer Locked

Level-Ordered Dependency Build Order

This question evaluates a candidate's ability to model dependency relationships as a graph and produce a valid topological build order. It tests knowl...

Coding & Algorithms
13
0
118 people solved
Jun 21, 2026
Natwest logo
NatwestGoogle
Medium
Software Engineer

Count Top-Left-Anchored Submatrices Within a Sum Limit

Count Top-Left-Anchored Submatrices Within a Sum Limit You are given an m by n integer matrix grid and an integer k. Return the number of nonempty con...

Coding & AlgorithmsGrids & MatricesArrays & Strings
1
0
12 people solved
Mercor logo
Mercor
Medium
Machine Learning Engineer

Design Candidate Search And LLM Evaluation Tasks

Prepare for an MLE onsite with three themes: finding top candidates from a job description, reasoning about an unreliable deterministic comparator, an...

ML System DesignRetrieval & Candidate GenerationRanking Models
40
0
364 people solved
Apr 21, 2026
OpenAI logo
OpenAI
Hard
Software Engineer Locked

Design a Large-Scale Streaming AI Product Feature

Design a product-facing AI feature for many concurrent users with streamed responses. Connect requirements and APIs to data modeling, consistency, sca...

System DesignReal-Time SystemsLLM Applications
69
0
512 people solved
Aug 11, 2026
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